Question

How to allocate 1MB in Scala

Answer 1

// Allocates 1 MB = 1,048,576 bytes
val buffer: Array[Byte] = new Array[Byte](1024 * 1024) 

println(s"Allocated ${buffer.length} bytes.")



 
/*
run:

Allocated 1048576 bytes.

*/

 

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Answer 2

import java.nio.ByteBuffer

// Allocates 1 MB = 1,048,576 bytes
val byteBuffer: ByteBuffer = ByteBuffer.allocate(1024 * 1024) 

println(s"Allocated ${byteBuffer.capacity()} bytes.")



 
/*
run:

Allocated 1048576 bytes.

*/

 

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Answer 3

// Allocates 1MB = 1,048,576 bytes (assuming each Long is 8 bytes)

val largeArray: Array[Long] = new Array[Long](128 * 1024) 

println(s"Allocated ${largeArray.length * 8} bytes.")


 
/*
run:

Allocated 1048576 bytes.

*/

 

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